THE BARLEY-CORN. 
23 
several roots already well started the barley embryo differs from 
that of most other grasses. 
Fig. 46 is taken from a transverse section passing through the 
base of the plumule, and here can be seen the whole series of 
leaf fundaments. Scu. is the scutellum, or supposed cotyledon. 
The section shown in Fig. 47 is taken through the tip of the 
plumule, and shows well the vascular tissue (in the notch below) 
which arises along the line where the edges of the carpel fuse. 
Fig. 48 is taken from a section passing through the body of 
Fig. 48. Transverse section through the middle of the grain beyond the 
embryo. The irregular darker zone of cells which underlies the aleurone 
cells does not contain starch. The rest of the endosperm is crowded with 
this food material. 
the grain. At the upper left and lower right hand may be 
seen very well the irregular layer of cells which underly the 
aleurone layer. The cells containing starch, composing the re¬ 
maining interior mass, appear light, the black points being the 
